Text file src/syscall/asm_nacl_amd64p32.s

     1	// Copyright 2013 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	#include "textflag.h"
     6	#include "funcdata.h"
     7	#include "../runtime/syscall_nacl.h"
     8	
     9	//
    10	// System call support for amd64, Native Client
    11	//
    12	
    13	#define NACL_SYSCALL(code) \
    14		MOVL $(0x10000 + ((code)<<5)), AX; CALL AX
    15	
    16	#define NACL_SYSJMP(code) \
    17		MOVL $(0x10000 + ((code)<<5)), AX; JMP AX
    18	
    19	TEXT ·Syscall(SB),NOSPLIT,$0-28
    20		CALL	runtime·entersyscall(SB)
    21		MOVL	trap+0(FP), AX
    22		MOVL	a1+4(FP), DI
    23		MOVL	a2+8(FP), SI
    24		MOVL	a3+12(FP), DX
    25		// more args would use CX, R8, R9
    26		SHLL	$5, AX
    27		ADDL	$0x10000, AX
    28		CALL	AX
    29		CMPL	AX, $0
    30		JGE	ok
    31		MOVL	$-1, r1+16(FP)
    32		MOVL	$-1, r2+20(FP)
    33		NEGL	AX
    34		MOVL	AX, err+24(FP)
    35		CALL	runtime·exitsyscall(SB)
    36		RET
    37	ok:
    38		MOVL	AX, r1+16(FP)
    39		MOVL	DX, r2+20(FP)
    40		MOVL	$0, err+24(FP)
    41		CALL	runtime·exitsyscall(SB)
    42		RET

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